How can I calculate the total number of the students (boy+girl) automatically? That means when I input boy and girl numbers, then automatically calculate the total students on the “total” field. Please see the screenshot:
https://drive.google.com/file/d/16wD7H1E3UuEJhiXZ3s-ueJE-1PjILsIA/view?usp=sharing
https://drive.google.com/file/d/1CbzE-lqKjkcxrCJfTk-6fVkNaaLyjPGN/view?usp=sharing
